Hmmm.... I see you point for Zend. In HHVM, we are getting this error:

HipHop Fatal error: Class undefined: \phpbb\template\twig\node\expression\binary\equalequal in /data/users/joelm/fbcode-opt/hphp/test/frameworks/frameworks/phpbb3/phpBB/vendor/twig/twig/lib/Twig/ExpressionParser.php on line 52

when running the test. So maybe it is on our end. I will investigate. We know the functionality of the test passes, but we have to include that file.